EP0411723A1 - A flexible conduit with a core portion extending through the flow passage thereof - Google Patents
A flexible conduit with a core portion extending through the flow passage thereof Download PDFInfo
- Publication number
- EP0411723A1 EP0411723A1 EP90202144A EP90202144A EP0411723A1 EP 0411723 A1 EP0411723 A1 EP 0411723A1 EP 90202144 A EP90202144 A EP 90202144A EP 90202144 A EP90202144 A EP 90202144A EP 0411723 A1 EP0411723 A1 EP 0411723A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- conduit
- core portion
- flow passage
- portion extending
- flexible conduit
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L11/00—Hoses, i.e. flexible pipes
- F16L11/04—Hoses, i.e. flexible pipes made of rubber or flexible plastics
- F16L11/12—Hoses, i.e. flexible pipes made of rubber or flexible plastics with arrangements for particular purposes, e.g. specially profiled, with protecting layer, heated, electrically conducting
- F16L11/121—Hoses, i.e. flexible pipes made of rubber or flexible plastics with arrangements for particular purposes, e.g. specially profiled, with protecting layer, heated, electrically conducting specially profiled cross sections
Definitions
- the invention relates to a flexible conduit for a liquid or gaseous fluid, with a core portion extending through the flow passage thereof, so as to prevent the conduit from being sqeezed or pinched together in case of folding and/or twisting of the conduit.
- GB-A-2,179,721 discloses a garden hose, in which the flow passage is divided into two sections by means of a partition which functions as a core portion and prevents the conduit from getting pinched or sqeezed together, so that the fluid may be kept flowing through the hose under all circumstances.
- a flexible conduit of the type above referred to is also suit necessarilyable for use in hospitals and other circumstances, where a physiological saline has to be supplied from a reservoir through a flexible hose and a catheter into the body of a patient.
- a flexible conduit without a core portion as mentioned herein above may readily get sqeezed or pinched together by various causes, e.g. by certain movements of the patient or due to the conduit getting sqeezed or pinched between parts of the (height)adjusting device of a modern hospital bed. This might cause an interruption of the supply of the physiological saline and would lead to serious consequences if the interruption would not be discovered immediately by the patient himself or the nursing personnel.
- a conduit of the type mentioned herein above is also suitable for use in pneumatic switch means for electric equipment, such as an electro-mechanical adjusting device in a hospital bed.
- pneumatic switch means for electric equipment such as an electro-mechanical adjusting device in a hospital bed.
- Such equipment is often designed to be controled by the patient himself.
- a hand-control box which is connected to the switch adjacent the equipment by means of a flexible air hose (vide FR-A-2,153,349).
- a flexible air hose vide FR-A-2,153,349
- the present invention provides a flexible tube of the type above referred to, which is characterized in that the core portion extending therethrough is constituted by one or more electrical leads.
- a composite conduit is particularly suitable for use in circumstances, where remote controled electrical equipment is connected to the mains by means of a wall plug, in which an electric switch is incorporated and designed to be pneumatically operated from a remote location, such as a patient location.
- Such a composite conduit is as flexible as a conduit without a core portion, while it has substantially greater flexibility than when a separate air hose would be brought together with a pair of electric leads within a common covering sheath, such as e.g. disclosed in GB-A-1,325,926.
- a composite conduit as proposed by the present invention is also completelty safe, because the electric leads are completely covered by the proper conduit and thus will be prevented from being exposed when under voltage. For as soon as the proper conduit would become pinched off or open, this would cause the (slight) switching pressure, to fall away and cause the switch into the wall plug to open instantly, thereby disconnecting said electric leads from the mains.
- the flexible conduit or hose 1, shown in the drawing, is formed of a suitable material, such as (artificial) rubber or similar material.
- a core 2 is extending through said conduit or hose 1, which is constituted by a pair of electrical leads 2a and 2b, which are embedded within the insulating material of the core 2.
- Special connectors will have to be attached to the ends of the composite conduit or hose so as to lead the proper conduit and the electrical leads to the associated pneumatic and electrical areas within the equipment and/or plug to be connected.
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Infusion, Injection, And Reservoir Apparatuses (AREA)
- Rigid Pipes And Flexible Pipes (AREA)
Abstract
A flexible fluid conduit (1), with a core portion (2) extending therethrough, so as to prevent the conduit (1) from getting sqeezed or pinched together in case of folding and/or twisting the conduit. According to the invention the core portion (2) is formed by one or more electrical leads.
Description
- The invention relates to a flexible conduit for a liquid or gaseous fluid, with a core portion extending through the flow passage thereof, so as to prevent the conduit from being sqeezed or pinched together in case of folding and/or twisting of the conduit.
- Conduits of this type are known. As an example GB-A-2,179,721 discloses a garden hose, in which the flow passage is divided into two sections by means of a partition which functions as a core portion and prevents the conduit from getting pinched or sqeezed together, so that the fluid may be kept flowing through the hose under all circumstances.
- Another example of such a conduit is disclosed in US-A-3,402,741, where a wire of a flexible nature but of a rigid cross-sectional shape is extending as a separate core through the flow passage of the conduit.
- A flexible conduit of the type above referred to is also suitable for use in hospitals and other circumstances, where a physiological saline has to be supplied from a reservoir through a flexible hose and a catheter into the body of a patient. In such circumstances a flexible conduit without a core portion as mentioned herein above may readily get sqeezed or pinched together by various causes, e.g. by certain movements of the patient or due to the conduit getting sqeezed or pinched between parts of the (height)adjusting device of a modern hospital bed. This might cause an interruption of the supply of the physiological saline and would lead to serious consequences if the interruption would not be discovered immediately by the patient himself or the nursing personnel.
- More particularly a conduit of the type mentioned herein above is also suitable for use in pneumatic switch means for electric equipment, such as an electro-mechanical adjusting device in a hospital bed. Such equipment is often designed to be controled by the patient himself. For this purpose there is a hand-control box, which is connected to the switch adjacent the equipment by means of a flexible air hose (vide FR-A-2,153,349). The use of an air hose with a core extending therethrough will prevent the air hose from being sqeezed or pinched together and thereby ensure the passage of air through the hose whenever it is desired to switch the equipment on or off.
- The present invention provides a flexible tube of the type above referred to, which is characterized in that the core portion extending therethrough is constituted by one or more electrical leads. Such a composite conduit is particularly suitable for use in circumstances, where remote controled electrical equipment is connected to the mains by means of a wall plug, in which an electric switch is incorporated and designed to be pneumatically operated from a remote location, such as a patient location. Such a composite conduit is as flexible as a conduit without a core portion, while it has substantially greater flexibility than when a separate air hose would be brought together with a pair of electric leads within a common covering sheath, such as e.g. disclosed in GB-A-1,325,926.
- A composite conduit as proposed by the present invention is also completelty safe, because the electric leads are completely covered by the proper conduit and thus will be prevented from being exposed when under voltage. For as soon as the proper conduit would become pinched off or open, this would cause the (slight) switching pressure, to fall away and cause the switch into the wall plug to open instantly, thereby disconnecting said electric leads from the mains.
- In the accompanying drawing a cross-sectional view of a conduit according to this invention has been shown by way of example.
- The flexible conduit or hose 1, shown in the drawing, is formed of a suitable material, such as (artificial) rubber or similar material. A
core 2 is extending through said conduit or hose 1, which is constituted by a pair ofelectrical leads 2a and 2b, which are embedded within the insulating material of thecore 2. - It will be clear, that various cross-sectional shapes for the
core 2 will have the effect of preventing the (outer) conduit or hose 1 to get sqeezed or pinched together when folding or twisting the conduit or hose in use. - Special connectors will have to be attached to the ends of the composite conduit or hose so as to lead the proper conduit and the electrical leads to the associated pneumatic and electrical areas within the equipment and/or plug to be connected.
Claims (1)
- A flexible conduit for a liquid or gaseous fluid, with a core portion extending through the flow passage thereof, so as to prevent the conduit from being sqeezed or pinched together in case of folding and/or twisting of the conduit, characterized in that the core portion extending therethrough is constituted by one or more electrical leads.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
NL8902015 | 1989-08-04 |
Publications (1)
Publication Number | Publication Date |
---|---|
EP0411723A1 true EP0411723A1 (en) | 1991-02-06 |
Family
ID=19855145
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP90202144A Withdrawn EP0411723A1 (en) | 1989-08-04 | 1990-08-06 | A flexible conduit with a core portion extending through the flow passage thereof |
Country Status (1)
Country | Link |
---|---|
EP (1) | EP0411723A1 (en) |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR1347596A (en) * | 1963-02-19 | 1963-12-27 | Flexible tube for endoscopes | |
DE8700361U1 (en) * | 1987-01-09 | 1987-07-23 | Linhart, Jirka, 51588 Nümbrecht | Elongated element that can be bent in all directions |
GB2211267A (en) * | 1987-12-17 | 1989-06-28 | Plysu Plc | Restrained air hose |
-
1990
- 1990-08-06 EP EP90202144A patent/EP0411723A1/en not_active Withdrawn
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR1347596A (en) * | 1963-02-19 | 1963-12-27 | Flexible tube for endoscopes | |
DE8700361U1 (en) * | 1987-01-09 | 1987-07-23 | Linhart, Jirka, 51588 Nümbrecht | Elongated element that can be bent in all directions |
GB2211267A (en) * | 1987-12-17 | 1989-06-28 | Plysu Plc | Restrained air hose |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
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AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): CH DE DK ES FR GB IT LI NL SE |
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STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION HAS BEEN WITHDRAWN |
|
18W | Application withdrawn |
Withdrawal date: 19910918 |